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CVE-2024-34342

HighPublished

react-pdf's PDF.js vulnerable to arbitrary JavaScript execution upon opening a malicious PDF

Published: May 7, 2024
Updated: Aug 2, 2024
Assigning CNA: GitHub_M
Evidence observed: Aug 5, 2026

Primary CVSS

7.1/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

EPSS probability estimate

1.1%

Low · next 30 days

Percentile: 62.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

react-pdf displays PDFs in React apps. If PDF.js is used to load a malicious PDF, and PDF.js is configured with `isEvalSupported` set to `true` (which is the default value), unrestricted attacker-controlled JavaScript will be executed in the context of the hosting domain. This vulnerability is fixed in 7.7.3 and 8.0.2.

Sources

CVE-2024-4367-PoCPoC
CVE-2024-4367 & CVE-2024-34342 Proof of Concept

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